I just finished changing my oil cooler and doing an EGR block off. This is just a thought that I have. Remove the CAC on the pass side, remove the egr flow cover on the oil cooler. You would need to get or make a nipple to fit into the coolant outlet on the oil cooler, remove the lower rad hose at the radiator. You would want to have a high volume-low pressure water source (water pressure regulator on a garden hose). Since you would be doing a full flush, it could be repeated a couple times. Most of the junk would flow through the water pump and out the lower hose.
I took my old cooler, flushed it with a hose and had a full water flow after. If I had to replace my oil cooler again, I would try it. Any thoughts would be appreciated. Thanks Jim

 

Id just replace the cooler itself.

 

I did insall a cooler kit, but when I took it apart, I saw that the cap on the oil cooler for the egr coolant source would be very easy to get to for a back flush. Beats $245 for a cooler kit, $50 in misc junk and 10 hours of work.

 

If your luck that may clear up a blockage on the coolant side. you need to think about this though... its a liquid to liquid cooler. that means you need to back flush the oil side aswell so its no really possible to do that.

 

I did not think that the oil side was any part of the problem, being that the oil is filtered. Unless the 6.0 owners have digital oil and water temp gauges or the new flash, they would never know about a plugged cooler until it was to late. After seeing the water flow direction and that the egr cap on the oil cooler is easy to get to, at least the junk could be loosened up, flushed out and the rest cleaned out with a coolant filter. Since I have a new oil cooler, I won't need to do this, but I may with the next flush. It's a shame that when we bought these trucks 7 years ago, a coolant filter would have saved us alot of money. Well, thats why I LOVE this site.

 

not gonna fight on this. but the oil side of the filters have been knowen to plug aswell. Remember even the best of filters is only 98% effective. that means that 2% gets by. also keep in mind that is spec for a new good filter. as time goes by the 98% can drop. this is also spec on the ford filter. there are others that are not 98%.

 

No fight from me. I was hoping to hear your input. Thanks Jim

 

So if the oil cooler is prone to clogging not only on the coolant side but on the oil side as well, in your estimation, what would be the percentage of failed coolers due to oil plugging?

 

its not high and not common but happens. I deal with many worst case trucks in a fleet heavy shop

 

He's right they do clogged over time. Good example mine I have the original one in mine dated back to 2003. When I tore it apart there was some good restriction in it. These trucks are picky do it cheap and your gonna ask for problems later.